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Moderate intensity exercise in hypoxia increases IGF-1 bioavailability and serum irisin in individuals with type 1 diabetes

Żebrowska, A; Sikora, M; Konarska, A; Zwierzchowska, A; Kamiński, T; Robins, A; Hall, B

Moderate intensity exercise in hypoxia increases IGF-1 bioavailability and serum irisin in individuals with type 1 diabetes Thumbnail


Authors

A Żebrowska

M Sikora

A Konarska

A Zwierzchowska

T Kamiński

B Hall



Abstract

Aim: This study aimed to determine the effect of moderate intensity continuous exercise (Ex) and hypoxia (Hyp) on serum brain-derived neurotrophic factor (BDNF), insulin-like growth factor-1 (IGF-1) and its binding protein-3 (IGFBP-3), irisin and cytokines levels in patients with type 1 diabetes (T1D). Methods:: A total of 14 individuals with T1D (age: 28.7 ± 7.3 years) and 14 healthy adults (age: 27.1 ± 3.9 years) performed 40-min continuous Ex at moderate intensity (50% lactate threshold) on a cycle ergometer in normoxia (Nor) and Hyp (FiO2 = 15.1%) Biochemical factors, glucose concentrations and physiological variables were measured at rest, immediately and up to 24 h after both Ex protocols. Results:: Patients with T1D had significantly lower pre-Ex serum concentrations of BDNF (p < 0.05, p < 0.01), and total IGF-1 (p < 0.001, p < 0.05) and significantly higher irisin levels (p < 0.05, p < 0.01) in Nor and Hyp, compared with healthy subjects. Ex significantly increased in T1D group serum BDNF (in Nor only p < 0.05) and total IGF-1 levels in Nor and Hyp (p < 0.001 and p < 0.01, respectively). Immediately after Ex in Hyp, freeIGF-1 (p < 0.05) and irisin levels (p < 0.001) were significantly higher compared with the levels induced by Ex alone. Free IGF-1 and irisin serum levels remained elevated in 24 h post-Ex in Hyp. In T1D, significant blood glucose (BG) decrease was observed immediately after Ex in Hyp (p < 0.001) and in 24 h recovery (p < 0.001) compared with pre-Ex level. Conclusion:: The study results suggest that moderate intensity continuous Ex has beneficial effect on BDNF and IGF-1 levels. Ex in hypoxic conditions may be more effective in increasing availability of IGF-1. The alterations in the post-Ex irisin levels and IGF-1 system may be contributing to more effective glycaemia control in patients with T1D.

Citation

Żebrowska, A., Sikora, M., Konarska, A., Zwierzchowska, A., Kamiński, T., Robins, A., & Hall, B. (2020). Moderate intensity exercise in hypoxia increases IGF-1 bioavailability and serum irisin in individuals with type 1 diabetes. Therapeutic Advances in Endocrinology and Metabolism, 11, 2042018820925326. https://doi.org/10.1177/2042018820925326

Journal Article Type Article
Acceptance Date Apr 21, 2020
Online Publication Date May 27, 2020
Publication Date May 27, 2020
Deposit Date Jun 1, 2020
Publicly Available Date Jun 1, 2020
Journal Therapeutic Advances in Endocrinology and Metabolism
Print ISSN 2042-0188
Electronic ISSN 2042-0196
Publisher SAGE Publications
Volume 11
Pages 2042018820925326
DOI https://doi.org/10.1177/2042018820925326
Keywords Original Research, diabetes, exercise, hypoxia, myokines
Publisher URL https://doi.org/10.1177/2042018820925326
Related Public URLs http://www.uk.sagepub.com/journals/Journal201936
Additional Information Additional Information : ** Embargo end date: 27-05-2020 ** From SAGE Publishing via Jisc Publications Router ** Licence for this article starting on 27-05-2020: https://creativecommons.org/licenses/by-nc/4.0/ **Journal IDs: eissn 2042-0196 **Article IDs: publisher-id: 10.1177_2042018820925326 **History: published_online 27-05-2020; accepted 21-04-2020; submitted 21-01-2020
Funders : Jerzy Kukuczka Academy of Physical Education, Katowice, Poland